Effect of stabilization annealing on SCC susceptibility of β-annealed Ti-6Al-4V alloy in 0.6 M NaCl solution

• Published in: Metals and materials international Vol. 24; no. 1; pp. 101 - 111
• Main Authors: Jeong, Daeho, Park, Jiho, Ahn, Soojin, Sung, Hyokyung, Kwon, Yongnam, Kim, Sangshik
• Format: Journal Article
• Language: English
• Published: Seoul The Korean Institute of Metals and Materials 01.01.2018; Springer Nature B.V; 대한금속·재료학회
• Subjects: Annealing; Characterization and Evaluation of Materials; Chemistry and Materials Science; Corrosion effects; Ductile fracture; Ductile-brittle transition; Engineering Thermodynamics; Heat and Mass Transfer; Machines; Magnetic Materials; Magnetism; Manufacturing; Materials Science; Metallic Materials; Processes; Slow strain rate; Sodium chloride; Solid Mechanics; Stabilization; Stress corrosion cracking; Titanium base alloys; 재료공학; alloy; corrosion; hydrogen; Ti-6Al-4V; β-annealing
• ISSN: 1598-9623; 2005-4149
• DOI: 10.1007/s12540-017-7303-7

The effect of stabilization annealing on the stress corrosion cracking (SCC) susceptibility of β-annealed Ti-6Al-4V (Ti64) alloy was examined in an aqueous 0.6 M NaCl solution under various applied potentials of +0.1, -0.05 and -0.1 V vs E corr , respectively, at a strain rate of 10 -6 s -1 . The stabilization annealing substantially improved the resistance to SCC of β-annealed Ti64 alloy in 0.6 M NaCl solution under cathodic applied potentials, while the effect was marginal under an anodic applied potential. It was also noted that the areal fraction between ductile and brittle fracture of β-annealed Ti64 specimens, which were slow strain rate tested in 0.6 M NaCl solution, varied with stabilization annealing and applied potentials. The effect of stabilization annealing on the SCC behavior of β-annealed Ti64 alloy in SCC-causing environment was discussed based on the micrographic and fractographic observation.